JEE Main · ChemistryHard
For a reaction , the rate law is . If the reaction is carried out in a vessel of constant volume and the initial pressure of is doubled while is kept constant, what happens to the initial rate?
- A.The rate doubles
- B.The rate quadruples
- C.The rate remains the same
- D.The rate becomes half
Show correct answer & step-by-step solution
Correct answer: A — The rate doubles
Solution
- From the ideal gas law, .
- At constant and , .
- The rate law is .
- Doubling the pressure of doubles its concentration .
- Therefore, the rate becomes .
- Hence the answer is (A).
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